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. 2017 Nov:284:66-72.
doi: 10.1016/j.jmr.2017.08.016. Epub 2017 Sep 1.

A method for measurement of spin-spin couplings with sub-mHz precision using zero- to ultralow-field nuclear magnetic resonance

A Wilzewski  1 , S Afach  1 , J W Blanchard  2 , D Budker  3
Affiliations

A method for measurement of spin-spin couplings with sub-mHz precision using zero- to ultralow-field nuclear magnetic resonance

A Wilzewski et al. J Magn Reson. 2017 Nov.

Abstract

We present a method which allows for the extraction of physical quantities directly from zero- to ultralow-field nuclear magnetic resonance (ZULF NMR) data. A numerical density matrix evolution is used to simulate ZULF NMR spectra of several molecules in order to fit experimental data. The method is utilized to determine the indirect spin-spin couplings (J-couplings) in these systems, which is achieved with precision of 10-2-10-4Hz. The simulated and measured spectra are compared to earlier research. Agreement and improved precision are achieved for most of the J-coupling estimates. The availability of fast, flexible fitting method for ZULF NMR enables a new generation of precision-measurement experiments for spin-dependent interactions and physics beyond the Standard Model.

Keywords: Spin-spin couplings; ZULF NMR; Zero-field NMR.

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